Adjustable wrist-pin bearing.



E. F. MORTON.-

ADJUSTABLB WRIST PIN BEARING.

APPLIGATION FILED DBO, 29, 1911.

1,032,620. Patented July 16, 1912.

2 8HEBTB-SHBET 1.

N INVENTOR:

COLUMBIA PLANOGHAPH co., WASHINGTON. 'D c.

E. F. MORTON.

ADJUSTABLE WRIST PIN BEARING.

APPLIO ATION FILED 1130.29, 1911.

1,032,620; v PatentedJuly16,1912.

z SHEETS-SHEET 2.

INVENTOR:

COLUMBIA FLANOGRAPH 50., WASHINGTON, D. c.

EZRA IE. MORTON, OF LONG PINE, NEBRASKA.

ADJUSTABLE WRIST-PIN BEARING.

To all whom it may concern:

Be it known that I, EZRA F. MORTON, a citizen of the United States ofAmerica, residing at Long Pine, in the county of Brown and State ofNebraska, have invented certain new and useful Improvements in Adjustable Wrist-Pin Bearings, of which the following is a specification.

This invention relates to adjustable wrist pin bearings and one of theprincipal objects of the invention is to provide means for taking uplost motion of the wrist pin in the bearing carried by the pitman of ahay mower or other machine or implement operated by a pitman.

Another object of the invention is to provide a bearing composed of twoblocks of brass or other similar material, each having a semi-circularopening therein for the wrist pin, said blocks being held in position bymeans of three wedges for clamping the bearing blocks together, saidwedges all being operated by a single nut for clamping the blocks.

Still another object of the invention is to provide means for taking upwear on the Wrist pin in the bearing blocks to prevent lost motion, byfiling away the meeting faces of the blocks and adjusting them by meansof the wedges.

It is a well known fact that the constant reciprocations of a pitmanwill wear the bearing for the wrist pin and in order to take up the wearand to prevent lost motion various means have been resorted to.

My invention'comprises a pair of bearing blocks preferably of brassprovided with meeting faces and a wrist pin bearing aperture extendingthrough the blocks. After the wrist pin has worn the bearing uponopposite sides of the aperture, the blocks are removed and filed away ontheir meeting faces, thus making the bearing aperture round and fittingthe wrist pin. The two blocks are held in proper position upon the endand connected to the pitman by means of three wedges as will behereinafter described.

Referring to the drawings :Figure 1 is a side elevation of a wrist pinbearing made in accordance with my invention and connected to the outerend of the pitman; Fig. 2 is a top plan View of the same; Fig. 3 is averticalsectional view; Fig. 4 is a detail Specification of LettersPatent.

Application filed. December 29, 1911.

Patented July 16, 1912. Serial No. 668,548.

perspective view of two of the wedges for the sides of the bearingblocks; and Fig. 5 is a detail perspective view of the locking wedge.

Referring to the drawings, the numeral 1 designates a pitman andconnected to the 0pposite edges of the end of the pitman are metal bars2, said bars being connected to the pitman by means of bolts 3 and nuts4.

The outer ends of the bars 2 are enlarged as at 5 and provided withrectangular openings 6 disposed in alinement as shown more clearly inFig. 3. The brass bearing blocks7 may be slightly wedge-shaped, as shownin Figs. 1 and 3 and said blocks are each provided with a semi-circularopening which when the two blocks are placed together form a circularopening 8 for the wrist pin. Two wedges 9 are passed through theopenings 6 with one face of each wedge bearing against one of the blocks7, said wedges each having a rectangular opening 10 at the smaller endthereof. The locking wedge 11 'is passed through the openings 10 andsaid locking wedge is threaded shank 12.

One of the bars 2 is provided with a turned up lug 13 through which thethreaded shank 12 extends and fitted to said threaded shank is a nut 14and a lock nut 15.

The operation of my invention may be briefly described as follows: Whenthe wrist pin wears the opening 8 as shown in dotted lines in Fig. 3,the two brass members 7 are removed from the pitman and filed away ontheir meeting faces until the aperture 8 is substantially round, afterwhich the blocks are replaced and the wedges adjusted by screwing up thenut 14 on the shank 12. After the adjustment has been made and theblocks 7 are adjusted closely together by the wedges the lock nut 15 isturned on the shank against the nut 14 to hold the members in place.

From the foregoing, it will be obvious that the entire adjustment onfour sides of the two block members is made by turning the nut 14 on theshank 12, thus clamping the four sides of the two block members 7 byadjusting one nut. It will also be apparent that by filing away themeeting faces of the two members 7 a substantially round bearing can beprovided for the wrist pin which will obviate all lost motion.

provided with a screw My invention is of simple construction,

eflioient for its purpose.

I claim:

1. An adjustable wrist pin bearing comprising a pair of blocks, each:provided with a semi-circu1ar opening therein, a pitman.

provided with bars having aiined openings therein, wedges extendingthrough said openings on opposite sides of the blocks, said wedges beingprovided with rectangular apertures, a locking wedge extending throughsaid apertures and provided with a threaded shank, said shank extendingthrough a lug formed on one of the bars connected to the pitma-n and avnut and lock nut on said shank.

2. A wrist pin bearing block comprising a pitman having apertured barsconnected thereto, a bearing block comprising two members, aperturedwedges for clamping said members together, said wedges passing throughthe apertures in the bars, a locking wedge extending through theapertures. in said wedges, said locklng wedge be ngpro- .vided with athreaded shank, and a nut and lock nut on said threaded shank.

3. An adjustable wrist pin bearing block comprising a pitman, two blockmembers provided with semi-circular openings therein, bars connected tosaid pitman and provided with alined openings, wedges extending throughsaid openings and bearing against the block members, said wedges beingprovided with openings, a locking wedge extending through said openings,a nut and lock nut fitted to the locking wedge for moving the same andclamping four sides of the block members.

In testimony whereof I aflix my signature in presence of two witnesses.

EZRA F. MORTON.

Witnesses:

MABEL PETERSON, C. A. ALLEN.

Copies of this patent may be obtained for ,five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

